package middlewares

import (
	"github.com/gin-gonic/gin"
	"net/http"
)

//func Cors() gin.HandlerFunc {
//  return func(c *gin.Context) {
//    method := c.Request.Method
//    origin := c.Request.Header.Get("Origin") //请求头部
//    if origin != "" {
//      //接收客户端发送的origin （重要！）
//      c.Writer.Header().Set("Access-Control-Allow-Origin", origin)
//      //服务器支持的所有跨域请求的方法
//      c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE,UPDATE")
//      //允许跨域设置可以返回其他子段，可以自定义字段
//      c.Header("Access-Control-Allow-Headers", "Authorization, Content-Length, X-CSRF-Token, Token,session")
//      // 允许浏览器（客户端）可以解析的头部 （重要）
//      c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Content-Type")
//      //设置缓存时间
//      c.Header("Access-Control-Max-Age", "172800")
//      //允许客户端传递校验信息比如 cookie (重要)
//      c.Header("Access-Control-Allow-Credentials", "true")
//    }
//
//    //允许类型校验
//    if method == "OPTIONS" {
//      c.JSON(http.StatusOK, "ok!")
//    }
//
//    defer func() {
//      if err := recover(); err != nil {
//        fmt.Printf("Panic info is: %v", err)
//      }
//    }()
//
//    c.Next()
//  }
//}

const (
	rate     = 1  // 每秒生成10个令牌
	capacity = 20 // 令牌桶的容量为20个令牌
)

func Cors() gin.HandlerFunc {
	return func(c *gin.Context) {
		method := c.Request.Method

		c.Header("Access-Control-Allow-Origin", "*")
		c.Header("Access-Control-Allow-Headers", "Content-Type,AccessToken,X-CSRF-Token, Authorization, Token, x-xss-protection, strict-transport-security, x-content-type-options, x-frame-options")
		c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT")
		c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Content-Type")
		c.Header("Access-Control-Allow-Credentials", "true")

		//tb := (&models.TokenBucket{}).NewTokenBucket(rate, capacity)
		//
		//if strings.Contains(c.Request.URL.Path, "/payment/test") {
		//	if !tb.TryConsume() {
		//		c.AbortWithStatusJSON(404, map[string]interface{}{"msg": "网络繁忙，请稍后再试", "isSuccess": false})
		//	}
		//}

		//放行所有OPTIONS方法
		if method == "OPTIONS" {
			c.AbortWithStatus(http.StatusNoContent)
		}
		// 处理请求
		c.Next()
	}
}
